When you plant your right foot on the accelerator pedal, its 335bhp 3.0-litre straight six responds with virtually no turbo lag, rocketing you from 0-62mph in a claimed 4.5 seconds. It also sounds much more invigorating than the four-cylinder engines with a smooth, free-revving nature that suits the M40i’s more focused demeanour. We even like the M40i’s snappy eight-speed gearbox.